There’s a continued need to measure and improve the user experience. In principle, it’s easy to see the benefits of having qualified participants use an interface and measuring the experience to produce reliable metrics that can be benchmarked against. But in practice, a number of obstacles make it difficult: time, cost, finding qualified participants, and even obtaining a stable product to test. These challenges seem

There isn't a usability thermometer to tell us how usable an interface is. We observe the effects and indicators of bad interactions then improve the design. There isn't a single silver bullet technique or tool which will uncover all problems. Instead, practitioners are encouraged to use multiple techniques and triangulate to arrive at a more complete set of problems and solutions. Triangles of course have